<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <form action="" method="get">
        <p>
            <label>省：</label>
            <select name="province">
                <option value="beijing">北京市</option>
                <option value="shanghai">上海市</option>
                <option value="tianjin" selected>天津市</option>
                <option value="chongqing">重庆市</option>
            </select>
        </p>
        <p>
            <label>省：
                <input type="text" list="province">
            </label>
            <datalist id="province">
                <option>北京市</option>
                <option>上海市</option>
                <option>天津市</option>
                <option>重庆市</option>
            </datalist>
        </p>
        <button type="submit">提交</button>
    </form>
</body>

</html>